Process ob hantjeagttjbing glazed sheet-iron



v J. &w.-w. WOOD. PROCESS OF MANUFACTURING GLAZED SHEET IRON.

No. 8,048. PatentedApr. 15, 1851.

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UNITED STATES PATENT 'onrion.

JOHN WOOD AND WM. W. WOOD, OF OONSHOHOGKEN, PENNSYLVANIA.

PROCESS. MANUFACTURING GLAZED SHEET-TRON.

Specification of Letters PatentNo. 8,048, dated April 15, 1851.

To all whom it may concern:

WILLIAM V. Woon, of Conshohocken, in the county of Montgomery and Stateof Pennsylvania, have discovered anew and Improved Process in theManufacture of Glazed Sheet-Iron; and we do hereby declare that thefollowing is a full and exact description thereof, reference being hadto the annexed drawings. e p

Figure 1, isa plan showing the pack of plates before itjis "subjected tothe rolling process. Fig. 2,.isa side view of ditto.

Fig. 3, is a plan showing the pack after being subjected to the rollingprocess. Fig. a is a side view of ditto. y

Thisimprovement consists in a new and peculiar modus opfercmclz',whereby every sheet orplate is finished with fine glazed and lustroussurfaces, iequal to the best Russia sheet iron, whereas by the ordinaryprocess, even with our former improvement (for which we and James food,Sent, obtained Letters Patent in 1842, and of which the principalfeature consisted in coating the surfaces ofthe plates with linseed oilor other oil or fatty material prior to finishing by heating and rollingthem,) nearly. one

' third part of the sheets, namely, the two outside sheets of each packof six or seven, were left very defective, they having becomeoxydizedbeyond remedy. In our new and improved process, after havingprepared the plates by deoxidating and oiling as described in our formerspecification, we place four (more or less) of the plates thus prepared,between two shield plates A A of double the thickness of the insideplates; the two shield plates A being as heavy as the four plates Bwhich are placed between them. The shieldplates, prior to being appliedas such, are deoxydated by being immersed in sulphuric or other acid,and are also coated with oil. These plates are nearly of equal surface,but a trifle longer than the thin plates. When a convenient number ofpacks are made up as above described, each p containing four thin platesbetween two Be it known that we, JOHN NVoon and shield plates, we submitone to a red heat ina suitable furnace, and pass it bet-ween ironrollers, and repeat the process ofheatmg and rolling until all theplates are eX- tended to nearly double the area of the origiand glossy;and these thin sheets being removed, the shield plates Aare each cut intwo, and prepared with acid and oil for constituting the inside sheetsof other packs, by being placed between other heavy shield plates. Allthe shield plates are thus wrought into smooth finished sheets, and theproduction of defective sheets is avoided.

The thin smooth sheets, either before or after being squared and trimmedto the proper size, are straightened by being placed between shieldplates, and passed, in a cold state, between the rollers. we place twothin sheets between two shield plates of double thickness, and whilethey are cold, pass them once or more between In this process therollers, giving them a heavy pressure,

whereby they are rendered smoother and more glossy.

What we claim as our invention and desire to secure by Letters Patent,is

The employment of thick plates of iron as shield plates; or, in otherwords, placing "four (more or less) thin plates between two shieldplates of double weight, in forming packs for rolling, will make twoplates of proper size to constitute the inside plates of another pack,for the smoothing and finishing process of rollm a Tn testimony whereofwe have hereunto so that each shield plate signed our names before twosubscribing witnesses. i

JOHN WVOOD. WM. W. WOOD. W 'itnesses WM. P. ELLIOT, RUFUs PORTER.

